Alarm clock



March 17 193& R H H A 2,4934%,124

' ALARM CLOCK Filed Nov. 50, 1954 Patented Mar. 17, 1936 UNITED STATES gi Y 2,034,124

PATENT OFFICE ALARM CLOCK Application November 30, 1934, Serial No.755,294

8 Claims.

This invention relates to improvements in alarm clocks.

One object of this invention is to provide an improved alarm-soundingconstruction formed of simple elements readily manufactured and readilyassembled to produce an efficient, compact construction at minimum cost.

Another object of this invention is to provide an improved alarm-clockconstruction in which 1 the bell construction is so formed and locatedas to provide limit-means for one of the coil-springs of theclock-movement, without the need of employing additional parts.

With the above and other objects in View, this invention includes allimprovements over the prior art which are disclosed in this application.

In the accompanying drawing, in which one way of carrying out theinvention is shown for illustrative purposes:

Fig. 1 is a front elevation of an alarm-clock movement made inaccordance with this invention;

Fig. 2 is a horizontal, fragmental, sectional view on line 2-2 of Fig.1;

Fig. 3 is a perspective view of the rear movement-plate, and the belland hammer-arm construction; and

Fig. 4 is a perspective view of the bell-mounting bracket.

In the description and claims, the various parts are identified byspecific names for convenience, but they are intended to be as genericin their application as the prior art will permit.

The main portion of the movement construction, including thetime-actuating mechanism and much of the alarm-actuating mechanism, areof ordinary construction.

Referring to the drawing, l and H are the front and rear movement-platesrespectively, secured together by the four pillars l2. The bell I3 issecured by a rivet I4 or by spot-welding or otherwise to the arm l5 of amounting or supporting-bracket 16, which latter is connected by rivets Hor otherwise to the rear movement-plate II. The mainspring winding-arborI8 is journaled in the movement-plates Ill and II and has securedthereto a main-wheel l9, and wound around the arbor I8 is a coiledmainspring 20 of usual type. The bell l3 has its concave face toward themain-wheel l9 and mainspring 20, and houses the portion of the lattertwo parts which extend beyond the edge of the movement-plates l0 and H.The parts are preferably so proportioned and arranged that when themainspring 20 unwinds to its maximum, it engages against and is limitedby the arm l5 of the supportingbracket Hi. The supporting-bracket l6 andbell l3 together constitute a construction which is hereinafter referredto by the term bell construction.

The alarm-spring winding-arbor 2| is journaled in the movement-plates I0and H and has secured thereto a coil-spring 22 and alarm-wheel 23, whichlatter actuates the verge-wheel 24, the rotation of which verge wheel iscontrolled by a verge 25 having integral trunnions 26 pivoted in themovement-plates l0 and II. Firmly secured to or integral with the verge25 is a hammer-arm 21, the upper end of which is bent to form a shutoifarm 28. The lower end of the hammer-arm 21 is given a 90 twist and isformed with a hammer 29, which latter may be integral, and is in aposition to have an oscillating action back and forth to strike the edge30 of the bell I3.

It will thus be seen that by the construction shown and described, thehammer mechanism can be made of maximum simplicity and can strike thebell without extending the hammer out beyond the movement-plates orpillars.

, It will also be observed that the arm 15 of the bell-supportingbracket [6 forms a limit or stop for the unwinding of the mainspring,without the need of employing any additional or special construction forthis purpose.

The invention may be carried out in other specific ways than that hereinset forth without departing from the spirit and essentialcharacteristics of the invention, and the present embodiment is,therefore, to be considered in all respects as illustrative and notrestrictive, and all changes coming within the meaning and equivalencyrange of the appended claims are intended to be embraced therein.

I claim:

1. An alarm-clock construction including: a movement including a pair ofspaced-apart movement-plates; a winding-arbor journaled in themovement-plates; a coil-spring not housed in a barrel and surroundingand adapted to be wound by the winding-arbor and adapted to expandbeyond an edge of said movement; a bellconstruction secured to saidmovement with the extreme edge surface of the bell adjacent said edge ofthe movement, the bell-construction being in a position to be engaged bythe coil-spring to limit the unwinding of the coil-spring; and ahammer-arm pivoted to the movement and having a hammer adapted to movein a direction approximately perpendicular to the plane of, and

strike against the extreme edge surface of the bell.

2. An alarm-clock construction including: a movement including a pair ofspaced-apart movement-plates; a bell-construction secured to saidmovement with the edge of the bell adjacent an edge of the movement; anda hammer-arm pivoted to the movement and having a hammer adapted to movein a direction approximately perpendicular to the plane of, and strikeagainst the extreme edge surface of the bell.

3. An alarm-clock construction including: a movement including a pair ofspaced-apart movement-plates; a winding-arbor journaled in themovement-plates; a coil-spring not housed in a barrel and surroundingand adapted to be wound by the winding-arbor and adapted to expandbeyond an edge of said movement; and a bell-construction secured to saidmovement with the extreme edge surface of the bell adjacent said edge ofthe movement, the bell-construction being in a position to be engaged bythe coil-spring to limit the unwinding of the coil-spring.

4. An alarm-clock construction including: a movement including a pair ofspaced-apart movement-plates; a bell-construction secured to saidmovement with the extreme edge surface of the bell adjacent an edge ofthe movement; and a hammer-arm pivoted between the movementplates andhaving a hammer adapted to move in a direction approximatelyperpendicular to the plane of, and strike against the extreme edge sur-.face of the bell.

5. An alarm-clock construction including: a movement including a pair ofspaced-apart movement-plates; a bell-construction secured to saidmovement with the extreme edge surface of the bell adjacent an edge ofthe movement; and a hammer-arm pivoted to the movement and having ashut-ofi arm extending transversely of the hammer-arm in one direction,and a hammer extending transversely of the hammer-arm in the oppositedirection and adapted to move in a direction approximately perpendicularto the plane of, and strike against the extreme edge surface of thebell.

6. An alarm-clock construction including: a movement including a pair ofspaced-apart movement-plates; a bell-construction secured to saidmovement with the extreme edge surface of the bell adjacent an edge ofthe movement; and a hammer-arm pivoted between the movementplates andhaving; a shut-off arm extending transversely of the hammer-arm in onedirection, and a hammer extending transversely of the hammer-arm in theopposite direction and adapted to move in a direction approximatelyperpendicular to the plane of, and strike against the extreme edgesurface of the bell.

7. An alarm-clock construction including: a movement including a pair ofspaced-apart movement-plates; a winding-arbor journaled in themovement-plates; a coil-spring not housed in a barrel and between themovement-plates and surrounding and adapted to be wound by thewinding-arbor, a portion of the coil-spring being adapted to expand in adirection out beyond an edge of the movement; and a concavebell-construction secured to said movement with the concave side of thebell toward and adapted to house said expandible portion of thecoil-spring, said bell-construction being adapted to limit the expansionof said expandible portion of the coilspring.

8. An alarm-clock construction including: a movement including a pair ofspaced-apart movement-plates; a winding-arbor journaled in themovement-plates; a coil-spring not housed in a barrel and between themovement-plates and surrounding and adapted to be Wound by thewinding-arbor, a portion of the coil-spring being adapted to expand in adirection out beyond an edge of the movement; and a concavebell-construction, including a supporting-bracket, secured to saidmovement with the concave side of the bell toward and adapted to housesaid expandible portion of the coil-spring, the supporting-bracket beingadapted to limit the expansion of said expandible portion of thecoilspring.

RICHARD H. WHITEHEAD.

